[media] media: platform: pxa_camera: add debug register access

Add pxa_camera registers access through advanced video debugging.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c
index 395cd398c32b3e0e8aeb808f1a3bf4878d1a4a31..fb89b85f59abfe3663e630d433b03e2f4b2182c3 100644 (file)
--- a/drivers/media/platform/soc_camera/pxa_camera.c
+++ b/drivers/media/platform/soc_camera/pxa_camera.c
@@ -1342,6 +1342,34 @@ static int pxa_camera_check_frame(u32 width, u32 height)
                (width & 0x01);
 }
 
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int pxac_vidioc_g_register(struct file *file, void *priv,
+                                 struct v4l2_dbg_register *reg)
+{
+       struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+       if (reg->reg > CIBR2)
+               return -ERANGE;
+
+       reg->val = __raw_readl(pcdev->base + reg->reg);
+       reg->size = sizeof(__u32);
+       return 0;
+}
+
+static int pxac_vidioc_s_register(struct file *file, void *priv,
+                                 const struct v4l2_dbg_register *reg)
+{
+       struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+       if (reg->reg > CIBR2)
+               return -ERANGE;
+       if (reg->size != sizeof(__u32))
+               return -EINVAL;
+       __raw_writel(reg->val, pcdev->base + reg->reg);
+       return 0;
+}
+#endif
+
 static int pxac_vidioc_enum_fmt_vid_cap(struct file *filp, void  *priv,
                                        struct v4l2_fmtdesc *f)
 {
@@ -1592,6 +1620,10 @@ static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops = {
        .vidioc_expbuf                  = vb2_ioctl_expbuf,
        .vidioc_streamon                = vb2_ioctl_streamon,
        .vidioc_streamoff               = vb2_ioctl_streamoff,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .vidioc_g_register              = pxac_vidioc_g_register,
+       .vidioc_s_register              = pxac_vidioc_s_register,
+#endif
 };
 
 static struct v4l2_clk_ops pxa_camera_mclk_ops = {